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1.5gm of a monobasic acid when disslved in 150g of water lowers Frezing pt by 0.165 degrees celsius.
0.5g of same acid when titrated,after dissolution in water, requires 37.5ml of N/10 alkali.Calculate degree of dissociation of acid(If Kf of water is 1.86)
Dear student,
Freezing point depression can be calculated using the Clausius-Clapeyron equation and Raoult's law. In a dilute ideal solution the freezing point is:
Freezing Pointtotal = Freezing Pointsolvent - ΔTf
where ΔTf = molality * Kf * i
Kf = cryoscopic constant (1.86°C kg/mol for the freezing point of water)
i = Van't Hoff factor
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Sagar Singh
B.Tech, IIT Delhi
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